From: Eli Zaretskii <eliz@gnu.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: psainty@orcon.net.nz, 42931@debbugs.gnu.org
Subject: bug#42931: 27.1; json-pretty-print-buffer on ~2MB line causes core dump
Date: Wed, 19 Aug 2020 18:18:38 +0300 [thread overview]
Message-ID: <831rk2eka9.fsf@gnu.org> (raw)
In-Reply-To: <87364i2039.fsf@gnus.org> (message from Lars Ingebrigtsen on Wed, 19 Aug 2020 16:15:38 +0200)
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Wed, 19 Aug 2020 16:15:38 +0200
> Cc: 42931@debbugs.gnu.org
>
> Phil Sainty <psainty@orcon.net.nz> writes:
>
> > On my system, Emacs hangs for quite a while and then core dumps.
>
> I can confirm that this leads to a segmentation fault (on Debian).
>
> [Current thread is 1 (Thread 0x7fbbb1c04000 (LWP 2154403))]
> (gdb) bt
> #0 raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
> #1 0x000055d08b0a0ac9 in terminate_due_to_signal
> (sig=sig@entry=11, backtrace_limit=backtrace_limit@entry=40) at emacs.c:408
> #2 0x000055d08b0a0f5f in handle_fatal_signal (sig=sig@entry=11)
> at sysdep.c:1786
> #3 0x000055d08b19bf9d in deliver_thread_signal
> (sig=sig@entry=11, handler=0x55d08b0a0f54 <handle_fatal_signal>)
> at sysdep.c:1760
> #4 0x000055d08b19c019 in deliver_fatal_thread_signal (sig=11) at sysdep.c:1883
> #5 handle_sigsegv (sig=11, siginfo=<optimized out>, arg=<optimized out>)
> at sysdep.c:1883
> #6 0x00007fbbb530d140 in <signal handler called> ()
> at /lib/x86_64-linux-gnu/libpthread.so.0
> #7 0x000055d08b1f7a43 in compareseq
> (xoff=xoff@entry=897, xlim=xlim@entry=17383858, yoff=yoff@entry=1353, ylim=ylim@entry=25500750, find_minimal=false, ctxt=ctxt@entry=0x7fff5bfa5610)
> at ../lib/diffseq.h:472
> #8 0x000055d08b1f7d94 in compareseq (xoff=<optimized out>,
> xoff@entry=897, xlim=xlim@entry=17383882, yoff=yoff@entry=1353, ylim=ylim@entry=25500806, find_minimal=false, ctxt=ctxt@entry=0x7fff5bfa5610)
> at ../lib/diffseq.h:510
looks like stack overflow? I guess the recursive nature of compareseq
is got to cause this at some point?
next prev parent reply other threads:[~2020-08-19 15:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-19 13:50 bug#42931: 27.1; json-pretty-print-buffer on ~2MB line causes core dump Phil Sainty
2020-08-19 14:15 ` Lars Ingebrigtsen
2020-08-19 15:18 ` Eli Zaretskii [this message]
2020-08-20 13:22 ` Lars Ingebrigtsen
2020-08-20 13:26 ` Philipp Stephani
2020-08-20 13:39 ` Eli Zaretskii
2020-08-24 23:46 ` Paul Eggert
2020-08-25 6:12 ` Eli Zaretskii
2020-08-25 18:19 ` Paul Eggert
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